Improvement in adding-machines



UNITED STATES PATENT CFFToE.

duwt-11513, or NEW YORK, N. Y.

IMPROVEMENT IN ADDING-MAQHINES.

Specification forming part of Letters Patent No. 75,322, dated March 10, 1868.

To all whom It-may concern:

' Beit known that I, G. H. WEBB, of the city, county, and State ot' New York, 'have iuventcd certain new and useful .Improvements in Adding Machinery or Apparatus; aud I do hereby declare that the following is a full description of the same. l

The nature of my invention consists, first, in arranging duplicate series of numerals on opposite margins ot' a disk, or thin plate of metal or other suitable material, in combination with a dial-plate, having a registeringhole in it, and a curved slot corresponding with the curved outline ofthe disk, and num.- bered on its edges with a series of numerals ot'a like character to the series ot' numbers on the margin ot' the disk-wheel; second', in the methodot' arranging thenumerals on the rotating disk, from 0 to 9, inclusive,'by prelixing a 0 before each numeral, so that the multiplying-whecl will count or add up .the sums-total after the numerals 499, as 10U, 101, 102, 103, 104, '105, 10c, 107, 10s, 109, without the interposition ot' any modification ot' the simple rotation ofthe disk or multiplyingwheel; third, in the combination of two or more studs or pins in the face of the diskwheel, with alever-and-pawl motion, and multiplying-wheel, f 'or the purpose ot' operating the multiplying-wheel soas to add up sums whose tota-ls exceed hundreds and thousands. But to describe my invention more particularly I will rct'er tothe accompanying drawings, forming. a part' of this specii'cation, -tlxe same letters of reference, wherever they occur, referring to like parts.

Figure l is `a plan view ot' the apparatus. Fig. 2 is a plan View off-the rotating numbered disk and multiplying-wheel, as arranged underneath the dial-plate. Fig. 3 is a cut section of the apparatus through line :c zc, Fig. l.

Letter A is the case or frame of the apparatus, having a disk or circular plate of met-al, B,

,arranged on a center-pin, c, in the middle ot' the case, and also on another center-pin, 1), scoured in the case just outside ot' the circum-v ference ot' the disk 4B, a second wheel, E, so arranged as to be on the same plane with the disk B, and having their edges rotate in contact with each other. 0n the margin of the disk B are two equal -subdivisions of duplicate figures from 0 (or zero) to 99, inclusive,

with the addition ol' the prefix of a cipher to and from the zero-point to the numeral 9, so that they would read on the disk thus: 00, 01, 02, 03, 04, 05,96, 07, O8-, 09. The object of this arrangement ot' thenumerals on the face ot' the' disk in duplicate, and also adding the cipher prefix to the numerals from zeropoint to 9, inclusive, is, first, to make each halt' rotation otl the disk add up'any sum less than 99, before the pin or stud F, in the face of the disk, comes in contact with the lever G, to carry forward the smallwheel E one degree or number, to make the sum add up 100, or any other addition, according to the relative positions of the tigures ou the two wheels; and,'secoud, for the purpose ot' enabling the single motions otl two wheels to indicate the additions ot 100, 1 01, Snc., to 109, which it would not be practicable to do it the numbers on the disk ran from 0 to 99, inclusive, and the numbers on the small wheel from l to 49, (or any other number,) inclusive. This will be obvious, because a single 0 following 99, on the large disk, would only read 10',

when opposite l on the small wheel. Therefore, without the prefix ofthe cipher to the numerals 0, or zero-point, up to 9, the apparatus would not bc capable ofadding up all sums correctly. Forthe purpose ot' controlling the motion ot' the two wheels-that is, to keep them steadily at any point desired-detentpins or springs H H are secured to the case, and arranged so as to engage in the wheels to detain them. Covering the surface ot' the inumerator-wheel or disks is a dial-plate, J, having an opening, K, in it just over the marginal figures of the numerator-wheels, so as t0 exhibit the sum-totalof the figures added' up. Also,'curved slots L and M, corresponding with the curvature'of' the numerator-wheels, and extending halt-way of` the circumference thereof. The object of' these slots is to ad mit ot' pointers N and l (inserted in indicators Q and lt, attached to the center-pins0 andi) of the numerator-wheels) engaging into holes S and T, in the face of the numeratorwheels, to rotate them, and also to limit the rotation of the numerator-wheelsto just half their circumference, or to the adding-up point at 0, or the bottom ofthe slot. [Io facilitate the operation of adding yup -tl1e" .gures" numerals from 0 to 99 are cut on the ,margin of die slot L, and by means of the corresponding` holes, S, in the numerator-Wheel B, the indicator is readily adjusted to any figure desired.

It is evident that the arrangement of tlie louble series of numerals upon the numerator-wheel B, the prefix of a cipher to the-digital numbers from zero (0) to nine, (9,) inclusive, upon said numerator'- wheel, together with the employment of the small multiplying-wheel E, arranged tangentially to the uuinerator-wheel B, secures the eonstruct-ion'ot' an exceedingly compact adding-machine, and one having a more extended tield ot usefulne'ss than is common to such devices.

To operate the machine, it is iirst necessary that the numerator-wheels are blanked, or set at the zero-point, so that at the aperture K three Os will only appear. This is accomplished by means of the Apointers N and P engaging in the holes S and T, in the face of the numerator-wheels, and rotating them till the zero-points come oppositeeach other;

When the numerator-wheels are thus adjusted the pointer N is supposed to be at the zeropoint of the slot L. 1Now, to tiud the sumtotal of the figures 9, 16, 26, 43, you move the indicator upward to figure 9, when you insert the pointer into the hole in the face of the numerator-wheel opposite or correspond- -iug with the ligure 9 on the dial-plate. The indicator is then carried forward to the zeropoint or end of the slot L, carrying with'it the numerator-wheel, when 9, with the prefix of two Os will appear at the aperture K. The indicator is now carried back again to number 16 ou the dial-plate, and brought down to the end ofthe slot as bet'ore, when the sinn of 25, with the prefix ot' one 0, will appeal'. The same operation with each-0f the other figures is gone through, giving the sums of 51 and 94 as the sunt-total ot'the `four sums. To carry the sum-total beyond 'the hundredpoint brings into action .the small numerator or multiplying-wheel, in consequence ofthe stud or piu F operating the lever G, to move or rotate it forward one degree. Therefore, if the sum 56 be added to the sum-total of 94, previously obtained, the sum-total of 150 will' appear atthe aperture, and by adding 72 to this sum-total ot' 150the addition of-222will appear at the aperture. It will, therefore, be readily perceived that the machine is capable of adding up sums of any amount, according to the multiple of numbers onl the small numerator-wheel.

Having now described my invention, I will proceed to set forth vwhat I claim and desire to secure .by Letters Patentof the United States:

1. I claim the duplicate series of numbers, arranged upon the margin of the numeratorwheel B, substantially as and for the purpose specified.

2. In combination with the above, claimA the semicircular slot- L, in -the dial-plate J, corresponding inextent with one of theduplicatc series of numbers, for the purpose sub-- stantially as described'.

3. I claim arranging, outhe dial-plate J, a series of numbers corresponding A iu extent with one of the seriesofnumbers upon the numerator-wheel B, substantially as described, and for the purposes specified.

4. I claim the prefix of a cipher, upon the numerator-wheel B, to the digital numbers from zero'(0) to nine, (9,) inclusive, for the purpose specified. y 5. In combination with the numerator-wheel B, I claim the revolving multiplying-wheel E, when arranged iup'apposition to the numerator-wheel, and having its edge in contact, or nearly in contact, therewith.

6. In combination with the elements. of the I above, I claim the slot K in the dial-plate J,

for the purpose specified.

7. Iclaim the arrangement of the numerator-wheel B, lever G, and multiplying-wheel E, all constructed substantially as described, and for the purposes specified.

8. 1n combination with the arrangementl above'specied, -I claim theslotted dial-plate J, when constructed substantially as and for the purposes specified.

- C. H. WEBB.

Witnesses:

C. ARTHUR ToT'rEN, C. L. BARRITT. 

